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Bridge dynamic load testing method based on neural network technology

A neural network and neural network model technology, which is applied in the field of dynamic load response testing and bridge dynamic performance evaluation, can solve the problems of non-universality, high test cost, insufficient precision, etc., to achieve accurate and reliable test results, and reduce the number of sports car tests. The number of times, the effect of reducing structural damage

Inactive Publication Date: 2012-07-04
SOUTHEAST UNIV
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Problems solved by technology

[0009] Therefore, the present invention proposes a bridge dynamic load test technology based on neural network technology, which can well solve the problems of high test cost, long time, insufficient precision and lack of universality, and has guidance for future bridge dynamic load tests sexual function

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  • Bridge dynamic load testing method based on neural network technology
  • Bridge dynamic load testing method based on neural network technology
  • Bridge dynamic load testing method based on neural network technology

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Embodiment Construction

[0028] The main process of the realization scheme of the present invention is specifically as follows (see figure 1 ):

[0029] 1) Statistically analyze a large number of existing dynamic load test data of bridge structures to determine the parameters affecting dynamic load response, such as vehicle speed, bridge span, bridge type, section geometric parameters, design reference period, service life, environmental factors, etc.;

[0030] 2) The dynamic load response influence parameters of the bridge structure are used as the input layer of the neural network, and the dynamic load response at different vehicle speeds is used as the output layer to construct a neural network model. The input layer of the neural network algorithm model has n neurons element x, x∈(x 1 , x 2 x n ), the hidden layer has d neurons h, h∈(h 1 , h 2 L h d ), the output layer has m neurons y, y∈(y 1 ,y 2L y m ). The weights and thresholds between the input layer and the hidden layer are w ij a...

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Abstract

The invention provides a bridge dynamic load testing method based on neural network technology, which includes conducting statistic analysis on a large amount of existing bridge testing results, determining dynamic load response affecting parameters of a bridge structure, using the affecting parameters as an input layer to construct a neural network model, and deducing structural dynamic load response predicted value; and conducting dynamic load actual measurement on the bridge under single vehicle speed, conducting reliability inspection on neural network theoretical derivation value by using actual measurement value, obtaining dynamic response verified through the actual measurement and characteristics of the bridge structure, and judging actual states and safety performance of the bridge structure according to the dynamic response and the characteristics of the bridge. Due to the fact that the bridge dynamic load testing method combines advantages of a conventional dynamic load testing method and the neural network technology is used to optimize a testing process, bridge dynamic load testing estimation conducted by means of the method greatly reduces structural damage caused by conventional dynamic load testing and improves analysis efficiency and operability on the basis of being capable of guaranteeing accurate and reliable testing results.

Description

technical field [0001] The invention relates to a bridge dynamic load detection technology based on neural network technology, which is especially suitable for dynamic load response test of various bridge structures and evaluation of bridge dynamic performance. Background technique [0002] The dynamic characteristics of bridge structures are important parameters for evaluating the bearing capacity of bridges, and are also important parameters for identifying the working performance of bridge structures and conducting dynamic analysis of bridge structures. With the promotion of my country's highway bridge inspection and evaluation system and the need for bridge safety assessment, more and more attention has been paid to the bridge dynamic load test, which has become an important means for the load test of new bridges and the evaluation of the bearing capacity of old bridges. The dynamic load test of the bridge mainly includes sports car test, braking test and vehicle jumping...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02G01M7/08G01M99/00G06N3/02
Inventor 王浩李峰峰宗周红王龙花
Owner SOUTHEAST UNIV
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